US4406660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non woven fabrics suitable for diaper and diaper coverstock
Assignee: Rohm and Haas Co
•
Filing: 1980-11-14
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Granted: 1983-09-27
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Expires: 2000-11-14
Abstract
Abstract Non-woven fibrous products, such as diapers, in which the fibres are bound together by an emulsion copolymer of C 4 C 8 ester of acrylic and/or methacrylic acid: at least one of methyl methacrylate, styrene or α-methyl styrene and acid comprising mono-unsaturated dicarboxylic acid optionally in combination with mono-unsaturated monocarboxylic acid. The fibres comprise at least 50% hydrophilic fibres such as cellulosic fibres.
Inventors
- 👤 Jean-Marc Beiner
- 👤 Jerome F. Levy
- 👤 Bernard J. M. Sweens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:47
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/425; D04H1/4258; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1804; D04H1/4326; D04H1/435; D04H1/58; D04H1/587; D04H1/593; D04H1/64; D04H1/645; D04H1/65; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S526/00; Y10S526/93; Y10T; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
A non-woven fibrous product whose fibres comprise at least 50%, by weight of dry fibre weight, of hydrophilic fibres, as hereinbefore defined, in which the fibres are bonded together by an emulsion copolymer of a monomer composition comprising: (a) 50-80% of the total monomers of at least one C 4 -C 8 ester of acrylic and/or methacrylic acid; (b) 10-49% by weight of the total monomers of at least one of methyl methacrylate, styrene and α-methyl styrene; and (c) 0.5-10% by weight of the total monomers of acid comprising at least one monoethylenically unsaturated dicarboxylic acid, optionally in combination with at least one monoethylenically unsaturated monocarboxylic acid; the copolymer being free from units containing methylol groups and free from added aminoplasts.
Claim 2
Dependent Claim
121 words
A non-woven fibrous product whose fibres comprise at least 50%, by weight of dry fibre weight, of hydrophilic fibres, as hereinbefore defined, in which the fibres are bonded together by an emulsion copolymer of a monomer composition comprising: (a) 50-80% of the total monomers of at least one C 4 -C 8 ester of acrylic and/or methacrylic acid; (b) 10-49% by weight of the total monomers of at least one of methyl methacrylate, styrene and α-methyl styrene; and (c) 0.5-10% by weight of the total monomers of acid comprising at least one monoethylenically unsaturated dicarboxylic acid, optionally in combination with at least one monoethylenically unsaturated monocarboxylic acid; the copolymer being free from units containing methylol groups and free from added aminoplasts.
Claim 3
Dependent Claim
36 words
A product as claimed in claim 1, wherein the fibres comprise at least 50% by weight of dry fibre weight of cellulosic fibres and the balance, if any, one or more other natural or synthetic fibres.
Claim 4
Dependent Claim
13 words
A product as claimed in claim 2, wherein the fibres are 100% rayon.
Claim 5
Dependent Claim
93 words
A product as claimed in claim 3, wherein the fibres are bonded together by an emulsion copolymer of a monomer composition comprising: (a) 60-80% by weight of the total monomers of at least one C 4 -C 8 alkyl ester of acrylic and/or methacrylic acid; (b) 15-30% by weight of the total monomers of at least one of methyl methacrylate, styrene and α-methyl styrene; (c) 1-6% by weight of the total monomers of acid comprising at least one monoethylenically unsaturated dicarboxylic acid, optionally in combination with at least one monoethylenically unsaturated monocarboxylic acid.
Claim 6
Dependent Claim
42 words
A product as claimed in claim 4, wherein component (c) comprises 0.5-3% by weight of the total monomers of at least one monoethylenically unsaturated dicarboxylic acid and 0.5-3% by weight of the total monomers of at least one monoethylenically unsaturated monocarboxylic acid.
Claim 7
Dependent Claim
18 words
A product as claimed in claim 5 wherein component (c) comprises itaconic acid and acrylic and/or methacrylic acid.
Claim 8
Dependent Claim
25 words
A product as claimed in claim 6 wherein the copolymer consists substantially of units of butyl acrylate, styrene, itaconic acid and acrylic and/or methacrylic acid.
Claim 9
Dependent Claim
19 words
A product as claimed in claims 2 or 3 in the form of diaper coverstock or a finished diaper.
Claim 10
Dependent Claim
17 words
A product as claimed in claim 7 in the form of diaper coverstock or a finished diaper.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-26 | 1987-03-28 | 1987-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-26 | 1991-03-28 | 1991-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-26 | 1995-03-28 | 1995-09-27 | $7700.00 | Window Closed / Lapsed |